This Bepinex mod allows you to use all of your equipment and tools while swimming in water.
You can also choose which items are usable in water by editing the config file as explained below.

For now (v0.2.4) the config file does not work anymore. That means every Item is allowed to be used in Water no matter what.
Thats because the latest update makes my mod require a rewrite in order to allow or deny specific items.
I will look into fixing that later

1. Install this mod manager: r2modman
2. Install the mod by directly installing it inside of the mod manager
3. Launch the game

1. Install the mod BepInExPack Valheim
2. Extract this mod's dll "UseEquipmentInWater.dll" into this folder: <Steam Location>\steamapps\common\Valheim\BepInEx\plugins
3. Launch the game

The config file allows you to decide which items you want to be usable in water which you do not want to be usable.
It can be accessed through the following methods

The config file can be editied from within the mod manager via the "Config Editor" menu

The config is located in this folder: <Steam Location>\steamapps\common\Valheim\BepInEx\config
Config name: com.lvh-it.valheim.useequipmentinwater.cfg